DES MOINES — Legislation that would withdraw tax incentives to Big Tech companies found to have censored online speech advanced in the Iowa Legislature, but lawmakers acknowledged the bill needs work, and Gov. Kim Reynolds stopped short of endorsing their efforts.House File 633 would target “dominant social media companies” by blocking or taking away government financial incentives for companies like Facebook and Google, which have data centers in Iowa, if it was determined in court they were limiting free speech.The bill is similar to Senate File 402, which also has been approved by a subcommittee.