You can find them on Steam.
The patch notes so far (today's 1.0.3.0. included):
Spoiler
Patch 1.0.2.2.
General
Fixed the "Can't create a profile" issue
Added the option to delete your profile - this will erase your save file and delete your profile from multiplayer rankings.
Track records from 2017 have been added to the game
Crashes
Fixed a crash that would randomly occur when loading a stage or at the beginning of a stage, in solo or multiplayer games.
Career
Fixed next year's sponsor budget not being calculated properly.
Fixed inconsistencies with max budget estimations and sponsorship contracts.
Fixed rider role initialization causing UI bugs in the Objectives menu when too many leaders were selected.
Races
Tour of Croatia now has different stages
Various graphical fixes
UI
Fixed Team>Squad button randomly being replaced with "invalid".
Rider names are cut in Omnium Mode
Hotfix 1.0.2.3.
Pro Cyclist
• Fixed an issue where the in-race objective "Ride in the front" wasn’t working properly
Multiplayer
• Fixed an issue where ladder game couldn’t be accessed due to a blocking message
• Fixed lan issue where adder games only had one race to play
Patch 1.0.2.4.
Crashes & connection issues
Fixed a crash when the GPU drivers were outdated or incorrectly installed
Note: the game will no longer crash if a driver issue is detected, however it might run very slowly, please keep your drivers up-to-date to allow the game to run properly.
Security mode: Offline mode is now available whenever the servers are unresponsive or encounter a big latency.
Career
Fixed salaries of not-yet renewed staff were preventing players to spend their whole budget and recruit the riders they wanted.
Inrace
Fixed Sprint orders not responding 1,5km before an intermediate sprint line.
Pro Cyclist
Fixed an issue where the player’s rider could receive offers from U23 teams
Fixed an issue where the player’s rider could sign with a U23 team
Others
Achievements: Fixed “Rainbow” achievement not working if the winning rider was in the player National team but not in his/her career team
Options: Fixed an issue where saving an option would launch a new solo game
Track mode: information regarding the Pause input (P) was missing
Minor level design fixes
Minor text fixes
Minor UI fixes
Patch 1.0.2.5.
Crash
Fixed a crash that would prevent players from reaching the second season in Pro Cyclist mode
Career
Now only Leaders and Sprinters (Both Absolute and not) are considered Leaders with objectives
UI
Fixed a blocking bug on the calendar when playing at 21:9 resolutions or wider.
Achievements:
Baptism of Fire no longer unlocks if the player does not participate in the race.
Patch 1.0.3.0.
Crashes & connection issues
- Fixed crash without error message following a black screen when launching the game.
- Added a safety check and error message if the game files are corrupted
Career
- Fixed an issue where next years maximum budget was stuck at 0 (retroactive fix)
- Fixed an issue where the wrong sponsor message was displayed on January 1st, instead of descriptions of the budget that you would expect based on sponsor satisfaction.
Pro Cycling
- Fixed riders not gaining XP after level 15.
AI
- Top 10 GC teams will no longer let the breakaway get too far ahead, prevening baroudeurs from crossing the finish line 25 minutes before the pack.
- The breakaway now slows down when it's 15 minutes ahead of the pack.
- Kittel is no longer considered an Outside Sprinter on MIlan-San Remo
Others:
- Achievement "Top Level" is now unlockable
- Fixed houses being sunk into the ground on La Vuelta
- Various graphical fixes
Upcoming fixes
- Pro Cyclist: teammates requests fixed (available soon on the beta branch)
- Carrer: Budget will be clarified with more details displayed