How many times can I try to enter the 2FA OTP before being locked out? July 07, 2022 08:07 Updated 5 times. After which, please wait for 10mins before trying again. Related articles How many times can I request for 2FA OTP? How can I authenticate my app with 2FA if I happen to forget my email/password? How long is the OTP valid for? If I have turned on 2FA OTP, can I turn it off? When does the McDonald’s® App require me to 2FA?