How to switch to AUSN?

• New business

Submit an application no later than 30 calendar days from the date of registration with the tax authority through your personal account on the Federal Tax Service website or through an authorized bank. If you register through the Federal Tax Service service, you can immediately submit a notice of switching to AUSN.

• Existing business

Submit an application no later than December 31 of the year preceding the transition through your personal account on the Federal Tax Service website or through an authorized bank. If you use the simplified taxation system or professional income tax, send a notice no later than the last day of the month preceding the month of transition.