You should include the amount received in 2026 even though it is not included on the 2025 Form 1099-LTC. You will make a similar adjustment on the 2026 tax return and subtract that same amount. And you need to add reimbursements received in January of 2027 on your 2026 return. You have to match the reimbursement with the expenses to which they relate, even though the years don't align.
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