On or before the last day of the fourth month of the year following that for which such declaration or amended declaration was filed, an annual return shall be filed and any balance which may be due the City shall be paid therewith in accordance with the provisions of Section 181.1301. Provided, however, that any taxpayer may file, on or before the last day of the first month of the year following that for which such declaration or amended declaration was filed, an annual return and pay any balance due at such time in lieu of filing such declaration or amended declaration, and in lieu of paying the final quarterly installment based upon a declaration or amended declaration of estimated tax. (Ord. 151-1971. Passed 12-27-71.)