My adjusted tax return is hundreds less than it should be, my Maryland refund isn’t being refunded at all and who is TPG Products?!

Were tax rates raised excessively in the last few years? I made less money and  paid more taxes ? The amount of my accepted refund is over $1000 more than  the amount that I recurved. I got an email saying the total was reduced and I recurved hundreds leas tha the adjusted amount!? What can I do now?