Pension plan benefit payout after parents death

Hello, I have a question about what the best plan of action would be to receive my mom's pension benefits for tax purposes.  She passed 6 years ago and I did not know she had this pension through her job. I got a letter notifying me of it. I am the executor of her estate and have 5 siblings to share this with, do not know the amount as of yet. The plan administrator has told me it would have to be sent to me and I would have to distribute it to my siblings. So, I'm reading thAt I would have to take the tax hit...is there any other avenue to take to avoid this or limit it?