Thank you! So I just submit the PBS Dependant extension application correct? Would I do it after the partner's application is approved? or both need to go in at the same time?

I am currently on a PBS dependent visa. I do not myself yet qualify for ILR (have not spent 5 years in the UK). My spouse is currently on a Tier 1 visa and is now eligible to apply for ILR under 5-year route. The question is what should I do? How can I extend my stay? What application I must submit....