LTC insurance reimb.

What should I do if Long term care costs paid in 2019.  Were reimbursed by the LTC Insurance Company in the January of 2020?

I feel these reimbursements should be recognized on the 2019 tax return, so they off set the payments made by my Mother-in-Law to her LTC facility in 2019.  Am I thinking correctly?  If I don't use them to offset her 2019 payments made, she will end up being taxed on money she should not be taxed on.

Thanks.