报一个H1B extension 提前18个月提交申请Approve Timeline: ECE to CS

因为网上说最早能提前6个月提交H1B延期申请,

律师说 可以提前12个月 提交H1B延期申请,

current H1b valid until 2019 June,

律师2017 Aug提交H1B延期申请,

H1b extension approved and get 797 in 2018 Jan

As for H4, 律师说 可以提前12个月 , H4 EAD, 律师说 可以提前6个月