Simple trust or Complex trust

My mother had a revocable trust.  she was the grantor.  She passed away in 2022 and now I am doing the taxes as successor trustee for 2023 which had income.  The trust is irrevocable now and I have an EIN, but Turbo tax asks what type of trust it is.  The trust documents say that the trust should pay the taxes, and not the beneficiaries.  It appears in Turbo Tax business that the only way for the income to be taxed to the trust is to make it a complex trust.  If I choose a simple trust it creates schedule K-1s for 2023 for both my brother and I.  The income received in 2023 was put in a money market account and I haven't distributed anything yet, since I was expecting taxes would have to be paid so I would use that account to pay the taxes before distributing any money to my brother and I.  The only other option is grantor trust but my mom was the grantor and she has passed away.  Should I choose complex trust or simple trust?  Mark