If you have already e-filed your tax return and received a notice from the IRS about your Form 1095-A that has required you to provide additional information, it will likely take a while before you hear and get your refund that is due. If the IRS makes corrections to your tax return, they will notify you.
The IRS suggests you allow at least 30 days for a response. If you have questions, call the telephone number in the upper right corner of your IRS notice.