No, there is not a way to request and extension or payment plan for the Homebuyer Credit itself, but you can request an installment agreement with the IRS is you owe tax debt. This can be done when filing your return in TurboTax and can also be requested online at
www.irs.gov/payments.
If you have questions about your FTHBC account, call the FTHBC toll free number at 1-800-919-0352.
This link explains how to apply for an installment agreement using TurboTax:
https://ttlc.intuit.com/replies/4062611
