I'm a UK citizen in the process of applying for a spouse visa to immigrate to the USA. It has been approved in principle, and I'm currently filling in my DS-260 form. My question is: is there a time limit for how long I have to complete this form? It has become apparent that for work-related reasons I will be staying in the UK for another year or so. It's already been 6 months since my visa was approved in principle.