Upvat return and tax

Sir, My problem is that recently Company open two new branch one within Uttar pradesh and other in Bihar but Head office in Uttar pradesh (lucknow). Q-1 How I file monthly return of all branches or All branch should be file monthly UPVAT return separately? Q-2 During goods transfer out of UP need CST form-F with road permit form-38 require or not and what %tax applicable on it. Q-3 Within UP branch goods transfer with transfer voucher tax apllicable or not?