[Tax year 2020] RMD form 5329 if I only took 1 or 2 IRA RM

I received an automatic IRA RMD in Dec 2020. I've entered it as a RMD via 1099R information. I have a second IRA account that I did not take the RMD. I keep getting an error message regarding the form 5329. Not usre how to proceed.