We went through all the trouble of contacting the manufacturer of our new windows to get the QMID and then discovered the IRS has qualified manufacturers and ours was not one of them. Per the IRS, " A qualified manufacturer for Energy Efficient Home Improvement Credits must meet all the requirements under IRC 25C(h)(3). The manufacturer must also be entered into a written agreement with the IRS."
https://www.irs.gov/credits-deductions/energy-efficient-home-improvement-credit-qualified-manufactur...
