Individual Tax Forms Document Form 521 Quarterly Estimated Tax Return Individual Net Profits and Earned Income Tax Form 521 Instructions Final Individual Tax Form 531 Local Earned Income and Net Profits Tax Return (2021 and Prior Years) 2021 Form 531 and Instructions 2020 Form 531 and Instructions Schedule X LST Exemption Certificate LST Refund Application Interest and Penalty Calculator None of the forms can be filed electronically. You must print them out and mail or bring them to the tax bureau.