Hi, im an MOT tester, you can take your car for a mot at any time however unless its within the last month it wont carry on from the current mot. as above it is better to make sure you know if there is something wrong with the car,

i would also suggest that if you know a mechanic/tester that you can trust ask them to check over all the bits that a mot would cover basically like a "pre-mot check" (a garage may charge for this)if you just want to know if there is something wrong/dangerous with the car or if you want to show or prove to the customer(buyer of car) then an mot would show that.