Click on your profile image in the upper right.
Then select "My Profile"
On your profile page you can upgrade or downgrade your account.
N.B. If you have transcription credit and you downgrade your account, it will be voided at the end of the subscription term.
Related Help Articles:
Can I purchase in advance and prepay for transcription / translation credit?
Do you have an on-premise solution for high-security environments?
Do you have team accounts?
How do I change my credit card details?
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