This is a self-service feature. Here's how activate 2FA:
1. Log in
UAE https://merchant.paytabs.com/merchant/login
KSA https://merchant.paytabs.sa/merchant/login
EGYPT https://merchant-egypt.paytabs.com/merchant/login
OMAN https://merchant-oman.paytabs.com/merchant/login
JORDAN https://merchant-jordan.paytabs.com/merchant/login
GLOBAL https://merchant-global.paytabs.com/merchant/login
2. Edit Account details
3. Toggle on "Two Factor Authentication"
And you're good to go!