Dear Ms. George,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Bills, Invoices, Sutler's Papers, and Other Records, 1862 - 1865 and Reports, Receipts, Invoices, and Shipping Notes Relating to Sutlers, 1863 - 1865 in the Records of the Office of the Quartermaster General (Record Group 92). Please contact National Archives at Washington, DC - Textual Reference (RDT1) via email at firstname.lastname@example.org for access to and/or copies of these records.
We also located Press Copies of Letters Sent Granting Permits to Sutlers, 1863 - 1865 in Record Group 92. These records have been digitized and can be viewed online through the Catalog.
In addition, we searched online and located a copy of a National Genealogical Society Magazine article by National Archives staff member, Claire Prechtel-Kluskens, that provides more information about these records and other NARA holdings relating to sutlers.
We hope this information is helpful. Best of luck with your research!