If I had a local small business that did let’s say a $1m in Rev, I could research and understand my state and local tax obligations, and file and remit applicab

If I had a local small business that did let’s say a $1m in Rev, I could research and understand my state and local tax obligations, and file and remit applicable taxes. If I take the same business, and make it national, selling online in all 50 states, that just effectively became impossible to do (given time/budget constraints)