In either case, there are circumstances when a family that is receiving FEPS may move, but only after receiving State approval through a FEPS provider. The family cannot pay the non-PA portion of the rent due to changes in family composition, rent increases, family income, or third party contributions.
In general, the IRS says you must file the form within three years from the date you filed your original return or with two years from the date you paid the tax, whichever is later. Filing an amended business tax return should be done as soon as you discover the error:
Traditional taxpaying corporations, known as C corporations, file their taxes using Form 1120. They can amend their return by filing Form 1120X. In general, the corporation can file an amended return within three years of the date the original return was due, or within two years of the date it paid the tax due on that return, whichever was later.