When should I pay the AOS and IV fees

Arrow_007

New Member
I belong to the F4 category visa. I have received the NVC case creation email on February 8,2021 with nvc case number and invoice id. Should i pay the fees within 1 year from the date that i received the email(i.e. February 8,2022). Or will NVC contact me again to start paying the fees?
 
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