The Texas TDI Supplement Form for County Mutual is a form used by Texas county mutual insurance companies to file supplemental health insurance premiums with the Texas Department of Insurance (TDI). This form is used to supplement the amount of premiums previously reported to the TDI and to provide additional details about the coverage and cost of the supplemental health insurance. There are two types of Texas TDI Supplement Forms for County Mutual: the Annual Supplement Form and the Quarterly Supplement Form. The Annual Supplement Form is used to report the total premiums collected on the supplemental health insurance plans for the prior calendar year. The Quarterly Supplement Form is used to report premiums collected on the supplemental health insurance plans for the quarter prior to the filing date. Both forms require information about the policyholder, the policy type, the plan year, and the premiums collected.