Some Verbascums are perennial and some are biennial, so unless you know which one yours is, then there's no way of knowing for sure. Since it has flowered and died back, I'm inclined to think it's a biennial one (they flower in the second year). If it is biennial, then it's a good thing you collected the seeds - you can wintersow them and get some new plants for next year. If it's a biennial, it will take two years to flower though - the first year it forms a rosette with the leaves, then in the second year it flowers.

It's probably a good idea to leave the dried up plant, just in case it is a perennial one. You'll know next spring - tug on the dead leaves and if they come away with no resistance and there is no sign of new growth underneath, then it was a biennial.

Thanks, Bonniepunch. I did a search and the closest I could find to what looked like my flower is called "white blush".....not to say that is it exactly, but the pic was the closest match that I could find so far. I really liked it no matter what it is so I really don't want to lose it. I will definitely be planting more for next year, just in case.