What you are referring to is the discovery process whereby each spouse is allowed to seek financial records from the other spouse. There is no clear limit on how far back records may be requested. A lot has to do with what the issues are in your particular case. If the request for production of documents seems overreaching or excessive in light of the issues involved, an objection to the Request for Production may be made, and the Judge in your case can be asked to rule on what is required to be produced and what does not have to be produced. Subpoenas are not normally used in this process unless you are requesting this information from a third party other than your spouse. Rule 34 of the North Carolina Rules of Civil Procedure governs the production of documents. If you wait until trial to seek documents, you are probably waiting much too late. I suggest you contact an attorney to assist you in the matter.