Tex. R. Disc. P. 17.10
Every attorney licensed to practice law in Texas who maintains, or is required to maintain, a separate client trust account or accounts, designated as such, into which funds of clients or other fiduciary funds must be deposited, shall further maintain and preserve for a period of five years after final disposition of the underlying matter, the records of such accounts, including checkbooks, canceled checks, check stubs, check registers, bank statements, vouchers, deposit slips, ledgers, journals, closing statements, accountings, and other statements of receipts and disbursements rendered to clients or other parties with regard to client trust funds or other similar records clearly reflecting the date, amount, source, and explanation for all receipts, withdrawals, deliveries, and disbursements of the funds or other property of a client.
Tex. R. Disc. P. 17.10