Today, I read a book about the physicology of money.

you need to say what the book is about. If you describe the book without words like “about” then the sentence becomes confusing

One of the last chapters told us about what is the target of the writer about moneythe writer’s goal.

This sentence is really confusing. I think you should take about the bit mentioning money since you mention it later, and change some parts to sound more natural.

Target of the writer’s goal is to get more money in his life is to be independent.

1. Saying “the ___ of the ___” sounds a bit unnatural in English. It works, but you should add the apostrophe with the s at the end of singular nouns to show ownership instead of you want to sound more natural/fluent
2. The word “target” works, but sounds a bit odd. A word like “goal” would work better.

What he means by independent is that he has enough money to fulfill what he need for hiss in life.

1. You need to have a pronoun when using a verb. Here, since you’re referring to the author, you should use “he”
2. The last bit is a bit of a complicated phrase in English, it’s a bit hard to explain and break down, but that’s how you should say it

The writer also says that to achieve his goal, he needs to control his want to upgrade his standard life whendesire to improve his life until he gets more income.

1. Whenever using the she/he/it pronoun, you normally add an “s” to the end of the verbs. There are a few exceptions, but these are because they are irregular verbs, and that’s a whole other topic
2. The end of your sentence was a bit confusing, but I think it’s because of the words you chose. Most of them work, but some need to be changed like “when” to “until”. The rest I just changed to make them sound more natural

His expectationd is to remain whenre he is until his income istarts rising.

1. I think you meant to say “expectation” instead of “expend”, but I’m not 100% sure
2. Again, in this context you should not say “when”. You should say “until”. The definition for “until” is “up to the point in time or the event mentioned.“
The rest I just changed to sound more natural

Independentce

Today, I read a book physic, The Psychology of mMoney.

Is the book you’re thinking of The Psychology of Money by Morgan Housel? I’ll assume so.

One of the last chapter told us about what is the target of the writer about moneyNear the end, the author explains his financial goals.

Target of the writer is to get more money in his life is to behe writer’s goal is to have enough money to become financially independent.

What mean byFinancial independentce is he hasaving enough money to fulfil what hemeet his own needs for the rest of his life.

The writer also sayid that in order to achieve this goal he need to control his, one must wanit to upgrade histheir standard life when he get more incomes until their income increases.

His expend is remain when hisExpenditures should remain constant while income is risinges.