Opinion by
Judge Rogers,These are consolidated appeals by the City and the School District of Pittsburgh from judgments of the Court of Common Pleas of Allegheny County awarding appellee, Cities Service Oil Company, refunds of deficiency assessments of mercantile license taxes, penalty and interest paid under protest.
Cities Service Oil Company conducted business at two locations within the City of Pittsburgh. One was a retail service station at Coltarit and Bates Street; the other a business office at 32 East Carson Street. After the passage of the Act of 1947, June 20, P. L. 745, 24 P.S. 582.1 and City of Pittsburgh Ordinance 509, *569approved December 15, 1948, imposing mercantile license taxes, the appellee filed its returns for the years 1949, 1950, 1951 and 1952 and paid the mercantile taxes due on its sales at the Coltart and Bates Street location. In the course of an audit made in 1951, the taxpayer’s manager upon inquiry by the supervisor of mercantile taxes explained at some length the scope of the operations conducted at the Carson Street location. In April 1957, appellants audited records of appellee’s operations at the Carson Street office and assessed mercantile tax deficiencies for the years 1949 through 1952 totaling with penalties and interest $47,381.65. In June 1957, the appellee paid this sum under protest and promptly filed a petition for a refund of the amount so paid.
The school taxes were levied under the authority of the Act of June 20, 1947, P. L. 745, supra, which provides in part as follows: “Section 8(b). The tax collector is hereby charged with the administration and enforcement of the provisions of this Act and is hereby empowered to prescribe, adopt, promulgate and enforce rules and regulations relating to any matter pertaining to the administration and enforcement of this Act, including provision for the reexamination and correction of returns, and payments alleged or found to be incorrect, or as to which an overpayment is claimed, or found to have occurred. No assessment may be made more than five years after the date on which such taxes should have been paid, except where a fraudulent return or no return has been filed. Any person aggrieved by any decision of the collector shall have the right to appeal to the county court of Allegheny County.” (Emphasis supplied.)
The city taxes were levied pursuant to its Ordinance No. 465, approved November 29, 1956, containing an identical limitation in deficiency assessments. Since the appellants did not assess the deficiencies for the *570years 1949-1952 until April 1957, the appellants’ claim for those alleged deficiencies was clearly barred unless it could, show that the taxpayer failed to file returns for those years or filed fraudulent returns. We agree with, the trial court that the appellants proved neither.
The appellants contend that the appellee had not filed returns for statute of limitation purposes because the Carson Street address was not listed as a “business location” on its returns for the years in question. The appellants’ position presupposes that a place of business as opposed to a “person” files a return under the mercantile tax law. This notion was rejected by . the Superior Court of Pennsylvania in Industrial Food Service, Inc. v. City of Pittsburgh, 171 Pa. Super. 291, 90 A. 2d 338 (1952). The court there held that the tax here involved is imposed on the taxpayer as a person engaged in business without regard to the number of establishments maintained and that the owner of several, restaurants was not required to compute taxes on additional establishments as though each was a new business. The appellee here was engaged generally in the business of supplying petroleum products to the public. It did all it was required to do when it filed its return showing the gross volume of sales it believed were subject to tax and where they were earned. Indeed, the form for return provided by the taxing bodies requires a report of gross sales and the places earned; it does , not require a listing of locations at which the taxpayer may carry on business.
Neither was there proof of a fraudulent return. The appellee’s former division office manager testified that he and other Cities Service executive honestly believed that the Carson Street operation was not subject to the mercantile tax. As noted, the nature of the Carson Street activities was explained to the supervisor of . the appellants’ mercantile tax division as early as 1951. It was not until 1955, and then only because of a *571court ruling, that the appellee’s activities at Carson Street as well as those of other oil companies came under scrutiny and two more years passed before audit and assessment.
The court below also concluded that the appellee’s activities at Carson Street were not subject to the mercantile tax. On this record it was again clearly correct. The only description of these activities we have is that of the appellee’s office manager, the auditors who in 1957 did the work leading to the assessment having since died.
The court below held that the appellee was entitled to interest on the amounts paid from the date the petitions for refund were filed in 1957.
It is settled law in Pennsylvania that . . where a taxpayer is entitled to a refund on an excess payment of taxes, whether such right accrues by virtue of statute or not, the taxpayer is entitled to interest on the refund if no statute or public policy militates against it.” Philadelphia, and Reading Coal and Iron Company v. Tamaqua Borough School District, 304 Pa. 489, 496, 156 A. 75, 77 (1931). It is also clear that before interest will accrue there must be an improper detention by the taxing authority; and the taxpayer must make a demand for refund. Girard Trust Company v. City and County of Philadelphia, 359 Pa. 319, 59 A. 2d 124 (1948). However, the taxing authority’s detention of the taxpayer’s money is not improper until there has been a decision to this effect. Such decision may be a county assessment board’s order reducing an assessment, Jefferson Memorial Park v. West Jefferson Hills School District, 397 Pa. 629, 156 A. 2d 861 (1959); or a court’s order on appeal from a county assessment board, Philadelphia and Reading Coal and Iron Company v. Tamaqua Borough School District, supra; or a court’s order dismissing exceptions to a decree nisi, Park v. Board of Education of Pittsburgh School Dis*572trict, 354 Pa. 236, 47 A. 2d 222 (1946); or an appellate court decision involving the same tax and the same taxpayer but a different tax year, Girard Trust Company v. City and County of Philadelphia, supra. We conclude, therefore, that the appellee was not entitled to interest until the court below, on November 17, 1970, ordered the refund.
In Koolvent Aluminum Awning Company of Pittsburgh v. City of Pittsburgh, 192 Pa. Super. 650, 162 A. 2d 256 (1960), the taxpayer had recovered judgment against the City School District of Pittsburgh for refund of mercantile taxes. It sued for interest from the date judgment was entered. The Superior Court held that interest should be allowed, “. .. from the time when the court below told the municipalities, by entry of judgments, that they never had any right to Koolvent’s money.” 192 Pa. Super. 657, 162 A. 2d 259.
In Koolvent, supra, and McDermott v. McDermott, 130 Pa. Super. 127, 196 A. 889 (1938), mention is made of a tendency to allow interest in accordance with principles of equity in order to do justice in the case at hand. Such principles applied here do not suggest that this taxpayer should receive interest for the twelve years since it paid the tax and filed for refund. The record is entirely silent as to the reason for this delay. It does show that in the interval the auditors on whose work the deficiency assessment was based had died, to the disadvantage of the taxing bodies at the trial. Furthermore, the appellee as the moving party had the burden of showing why this unusual delay was not due to its failure to press for an earlier resolution.
The judgment of. the Court of Common Pleas of Allegheny County is modified to include interest on the refunds from the date of the entry of judgment by the court below, November 17,1970, and as so modified, is affirmed.