Yes and no. It depends on other facts that we don't know. See a lawyer.
My answer is just my thought about your question, and not legal advice because you and I do not have an attorney-client relationship, which may begin only if we both sign a retainer agreement. Other lawyers may analyse your situation differently. Also, the answer may be different in your state. Be aware that I may not be licensed in your state. I am only licensed in Washington and Idaho. Be aware that my areas of practice may not cover your question. I practice Debt Settlement, Business, Asset Protection, Tax Reduction, Contracts, Real Estate Transactions, IRS, 501(c)3, State Departments: Labor and Industries, Employment Security, Revenue, Licensing.
Repayment of debt is not income. Interest earned on the loan is.
Wire transfer of funds into the US does not require a declaration with the Treasury department. Travelling into or out of the US with $10,000 or more of cash or financial instruments must declare it.
The above is general legal and business analysis. It is not "legal advice" but analysis, and different lawyers may analyse this matter differently, especially if there are additional facts not reflected in the question. I am not your attorney until retained by a written retainer agreement signed by both of us. I am only licensed in California. See also avvo.com terms and conditions item 9, incorporated as if it was reprinted here.
I agree that you should see a lawyer on this. Many things matter, including the status of the country the money is coming from and even who it is or what bank, if in an area the US deems questionable.
This should not be considered legal advice and is intended for educational purposes only. It does not constitute a contract for legal services between any parties. Answers are given to questions for which there may be additional facts not mentioned which might change the legal issues or consequences.