California doesn't enforce a gift tax, but you may owe a federal one. If you received a gift or inheritance, do not include it in your income.A gift letter must contain the donor's name, the gift's value, confirmation that the gift is not to be repaid, and the donor's signature. The IRS taxes gifts made over a certain dollar amount. If you give people a lot of money or property, you might have to pay a federal gift tax. But most gifts are not subject to the gift tax. What Are The Tax Implications of a Gift Letter? If their gift is too large, they may have to fill out a gift tax form when filing returns. If you give people a lot of money, you might have to pay a federal gift tax. But that doesn't mean the donor will pay taxes.