Dr.Paystub is an online check stub maker built by professional accountants, ensuring accurate calculations and instant delivery. No subscription required, no software to download, and no extra hidden fees. Our Dr. Paystub “AstroSync Tax API” is utilized to provide proof of income and a payroll stubs to employees by small business owners and contractors. Our AstroSync Tax API calculations are validated by our professional accountant partners and according to the Internal Revenue Code (IRC), enacted by Congress in Title 26 of the United States Code (26 U.S.C.)