Not to bum anyone out but she's likely not lying about the money she is making. In a different thread
@Lesbian Sleepover posted a link to a site they have found very reliable regarding YouTube earnings and the breakdown was that Hamber averages a CPM of $4; for Jan, Feb, and March she got 3.65M, 2.8M, and 3.1M monthly views respectively. January she probably wasn't near a $4 CPM because January CPM's are the worst of the year but she likely earned $5K, anyway basically any month besides January if she's pulling 3M views she's probably earning around $12k.
https://socialblade.com/youtube/c/amberlynnlifewithamberlynnreid/monthly
She got around 22.87M views in 2018 so this would average to a gross of $91,480. According to this
https://smartasset.com/taxes/income-taxes#WKnsnUJySZ it puts her effective combined total percentage for Federal, State, Local, and FICA at 29.94%, but she has to pay double for FICA due to being Self-employed (Employer and Employee pay half) so that would put her estimated percentage at 37.6%, so depending on what her actual specifics are she might not be lying that much about the percentage of her total income she paid across the board in taxes either.
I doubt she knows what Quarterly Estimated Income Tax payments are but she said she just puts money aside, so it doesn't sound like she pays them, instead just paying 1 lump sum in April. She very likely just cut the IRS a check for like $27K, State around $4.5K, and Local around $2.5K.